As someone who listens to a lot of niche artists, I was upset, that not all albums were present in MusicBrainz. So I came up with a solution.
Meet Lidarr++Deemix!
https://github.com/ad-on-is/lidarr-deemix
This tool helps to enrich Lidarr, by providing a custom proxy, that hooks into the process without modifying Lidarr itself, and injects additional albums from deemix.
I haven’t had much success with the arr-scripts, whereas with the lidarr:plugins + deemix I had.
I did not test it, but It should work, since it only pulls the albums, and is not involved in the download process at all.
Oh, and checks for existing ones, so there are no duplicates.